Eyelet-setting tool.



No. 672,884. Pa ten ted Apr. 30, I90].

W. E. BENNETT.

.EYELET SETTING TOOL.

(Application filed Oct. 22, 1900.)

(No Model.)

m: uonms PETER: w. PubTo-uwo. WASKINGTON o c UNITED STATES PATENTOFFICE.

WALTER E. BENNETT, OF PORTSMOUTH, NEW HAMPSHIRE, ASSIGNOR TO THE MORLEYBUTTON MANUFACTURING COMPANY, OF SACO, MAINE, AND BOSTON, MASSACHUSETTS.

EYVELET-SETTING TOOL.

SPECIFICATION forming part of Letters Patent No. 672.884, dated April30, 1901.

Application filed October 22, 1900- Serial No. 33,840. (No model.)

To all whom it may concern.- scoring or splitting operation is begun.Figs. Be it known that I, WALTER E. BENNETT, 4, 5, and 6 are views ofmodified forms of a citizen of the United States, residing at toolsembodying my invention. Portsmouth, in the county of Bockingham As thetool shown in Figs. 1, 2, and 3 is a 5 and State of New Hampshire, haveinvented practicable and serviceable form, I will ada new and usefulImprovement in Eyelet-Setdress my description particularly to that form.ting Tools, of which the following is a speci- The shaft or rod A isadapted to fit into an flcation. eyelet setting machine. B is a mandrelMy invention relates to eyelet-setting dewhich enters the tube of aneyelet and scores to vices; and its object is to provide 'a tool andsplits the end of the tube in the manner adapted for use ineyelet-setting machines or hereinafter set forth. The mandrel B tapersin hand eyelet setting instruments which from its base to its end, beingconical in shall score or split the end of the tube of the shape at itsbase or thick end and for about eyelet where the same is to be upset anda third of the way out from the base or any I5 flanged at regular andequal intervals and suitable distance to insure acomplete roundshallthen upset and flange the end of the ing out of the eyelet when formed,then betube when it is so split. With the eyelet-setcoming pyramidal inshape at the middle part ting tools now in use a smooth protuberance andconical again at the small end. The pyror mandrel circular in sectionand usually amid part may present any number of an- 20 tapered entersthe end of the tube of the eyegles or edges; but I find a hexagonalpyramid let, spreads and breaks the same, and then best suited for mypurpose. Its faces are an annular shoulder or cup around the base cutfrom the cone of which the base part of of the protuberance or mandrelforms the the mandrel is 'a frustum, and its edges a a flange upon theeyelet. On wedging open are protractions of the surface of said cone.

25 the end of the tube of the eyelet the smooth These edges orprojections a a score or cut round mandrel breaks or splits the tube inthe end of the tube of the eyelet when the several places and Whereverthe tube hapmandrelBis forced iutothe tube. Aboutthe pens to be weakest.As a result when the base of the mandrel B is the shoulder or anflangeis formed and the eyelet set the breaks nular cup 1) for upsettingtheend of the tube 30 in the flange are irregularly -and unevenly andforming the flange thereon. The tool is spaced and are more numerous insome eyeproportioned to the size of the eyelet which lets than inothers, causing the work to look it is intended to set. The mode ofoperation more ragged and unsymmetrical than is deof my eyelet-settingtool is made clear by refsirable. These defects are overcome by theerence to Fig. 3, in which 0 is an eyelet of or- 35 use of my invention,whereby the end of the dinary shape, the mouth of the tube being tube ofan eyelet may be scored or cut at reguslightly contracted. When themandrel B lar and equal intervals as the mandrel enters enters the tubethe scoring edges or projecit, thus evenly spacing the breaks in eachtions a a meet the end of the tube. As the flange and making all eyeletsuniform in apmandrel is forced in farther the scoring edges 40 pearance.a a cut or split the tube, as at c c, or by creas- The accompanyingdrawings illustrate, ening or scoring it so weaken it that when thelarged, some of the embodiments of my inthick part of the mandrel Benters the latter vention. breaks or splits the tube in the places soLike parts are indicated by like letters in creased or scored. The restof the operation 5 all the figures. is the same as is usual ineyelet-setting, the

Figure l is a view of one form of an eyeletend of the tube being upsetand the flange setting tool embodying my invention. Fig. formed by theshoulder or cup I) by means of 2 is a vertical longitudinal section ofthe tool pressure. shown in Fig. 1. Fig. 3 shows an eyelet in I do notconfine myself to a tool having a 50 which the tool is inserted part Wayand the mandrel of the precise shape above described,

as it is obvious that my invention is capable of embodiment in manyforms, some of which are sufficiently indicated in Figs. 4, 5, and 6. InFig. 4 the pyramidal portion of the mandrel B extends to the small end.In Fig. 5 the same is true, while the base of the mandrel B iscylindrical instead of conical. In Fig. 6 the entire mandrel is shown asconical, While the scoring edges or projections consist of theperipheral webs or blades 0, a, longitudinally disposed upon the mandrelB. The essential thing is to provide scoring projections on theperiphery of the mandrel adapted either to out the end of the tube ofthe eyelet or to crease it, so that it will split or break at thedesired points. I make the mandrel circular in cross-section at the baseand preferably conical, so as to spread the tube of the eyelet. Theobject of the circular base is to round out the eyelet-hole when the endof the eyelet is upset, since if the pyramidal form is carried to thebase the hole of the eyelet set thereby, instead of being round, ispolygonal in shape, corresponding to the shape of the mandrel. Thediameter of the base, which determines the size and form of theeyelet-hole, should be greater than the greatest diametrical distancebetween the scoring projections to insure a smooth round eyelet. Thetube of the eyelet commonly used is shaped like a frustum of a cone orconoid, and the scoring projections or edges of the tool need projectonly far enough to score or mark the small end of the tube of theeyelet, so as to weaken it and insure its breaking or splitting at thepoints of contact with said projections.

What I claim, and desire to secure by Letters Patent, is

1. In an eyelet setting tool, a mandrel adapted to enter the end of thetube of an eyelet and to spread the same, being circular incross-section at its base and polygonal in cross-section a shortdistance above the base.

2. In an eyelet-settingtool, atapering mandrel conical in shape at itsbase and pyramidal in shape a short distance above the base.

3. In an eyelet-setting tool, a tapering mandrel adapted to enter thetube of an eyelet and to spread the same, said mandrel being circular incross-section at its base and provided with peripheral longitudinalscoring edges above the base.

4:. In an eyelet-setting tool, a tapering mandrel, adapted to enter theend of the tube of an eyelet and to spread the same, said mandrel beingcircular in cross-section at and near the base, and being provided atits smaller part with a plurality of peripheral scoring edges arrangedlongitudinally upon, and at equal intervals about said mandrel.

5. In an eyelet-setting tool, a tapering mandrel adapted to enter theend of the tube of an eyelet and to spread the same, said mandrel beingcircular in cross-section at its base and provided with peripherallongitudinal scoring edges above the base, the diameter at the basebeing greater than the greatest diametrical distance between the scoringedges.

6. In an eyelet-setting tool, atapering mandrel circular incross-section atits thick end, polygonal in cross-section at its middlepart, and circular in cross-section at its small end.

7. In an eyelet-setting tool, a mandrel having a base part in the formof a cone, a middle part in the form of a pyramid, the surface of whichif produced would be inscribed within the cone of the base, and a tip inthe form of a cone the surface of which if produced would be inscribedwithin the pyramid of the middle part, substantially as described.

Signed by me at Portsmouth, New Hampshire, this 19th day of October,1900.

WALTER E. BENNETT.

Witnesses: EDWARD H. ADAMS, KATHERINE R. MILLER.

